De Dietrich 7631144 BIC328 controller

The De Dietrich 7631144 BIC328 controller (catalogue article 336.568.042) is an electronic control board (PCB) used as the burner control in a boiler. This type of controller manages the entire ignition and safety sequence: it initiates pre-purge, ignition spark, fuel admission, and flame proving, while enforcing the programmed safety times. It reads signals from the flame detector (ionisation, UV, or IR) and pressure switches, and drives the ignition transformer, gas valve, and fan. In modern wall-hung boilers, the PCB replaces the traditional control box and integrates these functions on a single board. Selection of a replacement controller must be based on the exact series and type designation, supply voltage, safety times (pre-purge, ignition, lockout), and flame detection method. Even within the same brand, controllers are not interchangeable across series; a mismatched safety time or voltage creates a safety hazard, not merely a performance issue. For electronic control boards such as this one, the correct match is specific to the boiler model, as the board is designed for that appliance’s wiring and software. When sourcing a replacement, verify the part number on the existing board (7631144 / 336.568.042) and confirm it is the correct revision for the installation. No physical dimensions or power ratings are given here; always compare the base pattern and connector layout with the original.